[Bug c++/109860] New: ICE: in make_typename_type, at cp/decl.cc:4268

[Bug c++/109860] New: ICE: in make_typename_type, at cp/decl.cc:4268

[hewillk at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109860

            Bug ID: 109860
           Summary: ICE: in make_typename_type, at cp/decl.cc:4268
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hewillk at gmail dot com
  Target Milestone: ---

#include <tuple>

template<class T>
concept C = requires {
 typename std::template tuple<T>;
};

https://godbolt.org/z/MrrMvrbhT

[Bug c++/109860] ICE: in make_typename_type with redudant template in requires with typename

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109860

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |8.1.0
            Summary|ICE: in make_typename_type, |ICE: in make_typename_type
                   |at cp/decl.cc:4268          |with redudant template in
                   |                            |requires with typename
           Keywords|ice-on-invalid-code         |ice-on-valid-code

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This code is valid as far as I Know.
Reduced testcase:
```
namespace t {
  template<class T>
  struct tuple {};
}
template<class T>
concept C = requires {
 typename t::template tuple<T>;
};
```

clang accepts the code. the template there is not needed but should be ok.

[Bug c++/109860] ICE: in make_typename_type with redudant template in requires with typename

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109860

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-05-15
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

[Bug c++/109860] ICE: in make_typename_type with redudant template in requires with typename

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109860

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The following adjusted test (added 'bool') started to ICE with
r6-2674-g971e17ff87337a:

commit 971e17ff87337ad533b51c2dff0bbdf607fa1faf
Author: Andrew Sutton <andrew.n.sutton@gmail.com>
Date:   Fri Aug 7 05:44:49 2015 +0000

    Add C++ Concepts TS support.



namespace t {
  template<class T>
  struct tuple {};
}
template<class T>
bool concept C = requires {
 typename t::template tuple<T>;
};